| [整理]CAS单点登录，服务端和客户端验证流程，抓包分析，带代码简单分析 | ||
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| 添加日期：2013/10/30 11:53:47 | 快速返回 返回列表 | 阅读50321次 |
我用的代码是cas-server-3.5.2-release.zip和cas-client-3.2.1-release.zip。 （1）直接访问server端login页面 请求： GET /cas/login HTTP/1.1 ...省略.. 响应： HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Pragma: no-cache Expires: Thu, 01 Jan 1970 00:00:00 GMT Cache-Control: no-cache Cache-Control: no-store Set-Cookie: JSESSIONID=2DA712066025406394C7C644AF16FD18; Path=/cas Content-Type: text/html;charset=UTF-8 Content-Length: 1993 Date: Wed, 30 Oct 2013 01:53:49 GMT 内容就是登陆表单，省略 对于Server端流程来说，走的是 <decision-state id="ticketGrantingTicketExistsCheck"> <if test="flowScope.ticketGrantingTicketId != null" then="hasServiceCheck" else="gatewayRequestCheck" /> </decision-state> TGT不存在，走gatewayRequestCheck <decision-state id="gatewayRequestCheck"> <if test="requestParameters.gateway != '' and requestParameters.gateway != null and flowScope.service != null" then="gatewayServicesManagementCheck" else="serviceAuthorizationCheck" /> </decision-state> 走serviceAuthorizationCheck <action-state id="serviceAuthorizationCheck"> <evaluate expression="serviceAuthorizationCheck"/> <transition to="generateLoginTicket"/> </action-state> 执行认证check，然后转到generateLoginTicket <action-state id="generateLoginTicket"> <evaluate expression="generateLoginTicketAction.generate(flowRequestContext)" /> <transition on="generated" to="viewLoginForm" /> </action-state> 生成登录小票，转到login表单 <view-state id="viewLoginForm" view="casLoginView" model="credentials"> <binder> <binding property="username" /> <binding property="password" /> </binder> <on-entry> <set name="viewScope.commandName" value="'credentials'" /> </on-entry> <transition on="submit" bind="true" validate="true" to="realSubmit"> <evaluate expression="authenticationViaFormAction.doBind(flowRequestContext, flowScope.credentials)" /> </transition> </view-state> 对应的jsp页面是WEB-INF\view\jsp\default\ui\casLoginView.jsp -------------------------------------------------------------------------- （2）输入用户名、密码，登录 请求： POST /cas/login;jsessionid=2DA712066025406394C7C644AF16FD18 HTTP/1.1 Content-Type: application/x-www-form-urlencoded ...部分省略... Cookie: JSESSIONID=2DA712066025406394C7C644AF16FD18 username=admin&password=1&warn=true<=LT-3-Ahdqm03UKMR9vwuy7A5ZSCMa9zJkNi&execution=e1s1&_eventId=submit&x=53&y=55 其中的LT-3-Ahdqm03UKMR9vwuy7A5ZSCMa9zJkNi就是登录小票， 后台会比较“提交的值”和“后台保存的是否一致”。这个类似于验证码，没啥说的。 响应： HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Pragma: no-cache Expires: Thu, 01 Jan 1970 00:00:00 GMT Cache-Control: no-cache Cache-Control: no-store Set-Cookie: CASPRIVACY=true; Path=/cas/; Secure Set-Cookie: CASTGC=TGT-2-DmMvVs9Wy01ScbnMtgtLzgcyX5X14TGcM1f5iGuWIBrlDwTg4Q-cas01.example.org; Path=/cas/ Content-Type: text/html;charset=UTF-8 Content-Length: 1602 Date: Wed, 30 Oct 2013 01:54:03 GMT 后台设置了两个cookie，一个是CASPRIVACY=true，不知道干嘛用的 一个是CASTGC，这个就是TicketGrantingTicket Cookie，就是说，你想买通票，你还得先买门票进去的意思，tgc就是门票。 这样，客户端浏览器就拥有了TGC门票。下次再访问cas server时就会带着这个门票来了。 后台执行流程： 由上面viewLoginForm的定义，表单提交后，会执行authenticationViaFormAction.doBind方法，然后跳到realSubmit <action-state id="realSubmit"> <evaluate expression="authenticationViaFormAction.submit(flowRequestContext, flowScope.credentials, messageContext)" /> <transition on="warn" to="warn" /> <transition on="success" to="sendTicketGrantingTicket" /> <transition on="error" to="generateLoginTicket" /> <transition on="accountDisabled" to="casAccountDisabledView" /> <transition on="mustChangePassword" to="casMustChangePassView" /> <transition on="accountLocked" to="casAccountLockedView" /> <transition on="badHours" to="casBadHoursView" /> <transition on="badWorkstation" to="casBadWorkstationView" /> <transition on="passwordExpired" to="casExpiredPassView" /> </action-state> 执行authenticationViaFormAction.submit方法， 看一下代码： public final String submit(final RequestContext context, final Credentials credentials, final MessageContext messageContext) throws Exception { // Validate login ticket final String authoritativeLoginTicket = WebUtils.getLoginTicketFromFlowScope(context); final String providedLoginTicket = WebUtils.getLoginTicketFromRequest(context); if (!authoritativeLoginTicket.equals(providedLoginTicket)) { this.logger.warn("Invalid login ticket " + providedLoginTicket); final String code = "INVALID_TICKET"; messageContext.addMessage( new MessageBuilder().error().code(code).arg(providedLoginTicket).defaultText(code).build()); return "error"; } final String ticketGrantingTicketId = WebUtils.getTicketGrantingTicketId(context); final Service service = WebUtils.getService(context); if (StringUtils.hasText(context.getRequestParameters().get("renew")) && ticketGrantingTicketId != null && service != null) { try { final String serviceTicketId = this.centralAuthenticationService.grantServiceTicket(ticketGrantingTicketId, service, credentials); WebUtils.putServiceTicketInRequestScope(context, serviceTicketId); putWarnCookieIfRequestParameterPresent(context); return "warn"; } catch (final TicketException e) { if (isCauseAuthenticationException(e)) { populateErrorsInstance(e, messageContext); return getAuthenticationExceptionEventId(e); } this.centralAuthenticationService.destroyTicketGrantingTicket(ticketGrantingTicketId); if (logger.isDebugEnabled()) { logger.debug("Attempted to generate a ServiceTicket using renew=true with different credentials", e); } } } try { WebUtils.putTicketGrantingTicketInRequestScope(context, this.centralAuthenticationService.createTicketGrantingTicket(credentials)); putWarnCookieIfRequestParameterPresent(context); return "success"; } catch (final TicketException e) { populateErrorsInstance(e, messageContext); if (isCauseAuthenticationException(e)) return getAuthenticationExceptionEventId(e); return "error"; } } service就是指子系统的URL，由于直接访问的server端login，所以URL中没有service参数，所以grantServiceTicket不会执行。 最后，会createTicketGrantingTicket，然后放到request中。 返回success，跳转到sendTicketGrantingTicket <action-state id="sendTicketGrantingTicket"> <evaluate expression="sendTicketGrantingTicketAction" /> <transition to="serviceCheck" /> </action-state> 这里是把TicketGrantingTicket写到Cookie。 然后跳到serviceCheck <!-- <decision-state id="serviceCheck"> <if test="flowScope.service != null" then="generateServiceTicket" else="getSubSystemUrl" /> </decision-state> --> <decision-state id="serviceCheck"> <if test="flowScope.service != null" then="getSubSystemUrl" else="getSubSystemUrl" /> </decision-state> <action-state id="generateServiceTicket"> <evaluate expression="generateServiceTicketAction" /> <transition on="success" to ="warn" /> <transition on="error" to="generateLoginTicket" /> <transition on="gateway" to="gatewayServicesManagementCheck" /> </action-state> <action-state id="getSubSystemUrl"> <evaluate expression="getSubSystemUrlAction.get(flowRequestContext, flowScope.credentials)" /> <transition to ="viewGenericLoginSuccess" /> </action-state> 这段被我改过，原来是：有service到generateServiceTicket，没有直接到viewGenericLoginSuccess 我改成了，都跳到getSubSystemUrl。这个action是我自己加的，目的是去数据库取得子系统URL，并取得用户对每个子系统的权限。 然后跳转到viewGenericLoginSuccess <end-state id="viewGenericLoginSuccess" view="casLoginGenericSuccessView" /> viewGenericLoginSuccess，也就是登录成功页面，就是服务端WEB-INF\view\jsp\default\ui\casGenericSuccess.jsp这个页面。 我在这里显示了几个子系统的链接。 这里的view写的都是id，实际对应的文件在WEB-INF\classes\default_views.properties中定义。 -------------------------------------------------------------------------- （3）然后点击页面上的链接，访问子系统 请求： GET /UserManage/ HTTP/1.1 响应： HTTP/1.1 302 Moved Temporarily Server: Apache-Coyote/1.1 Location: http://10.0.103.137:8080/cas/login?service=http%3A%2F%2F10.0.103.137%3A8080%2FUserManage%2F Content-Length: 0 Date: Wed, 30 Oct 2013 01:54:22 GMT 由于子系统增加了CAS client的Filter。 <filter> <filter-name>CAS Authentication Filter</filter-name> <filter-class>org.jasig.cas.client.authentication.AuthenticationFilter</filter-class> <!-- CAS login 服务地址--> <init-param> <param-name>casServerLoginUrl</param-name> <param-value>http://10.0.103.137:8080/cas/login</param-value> </init-param> <!-- 客户端应用服务地址--> <init-param> <param-name>serverName</param-name> <param-value>http://10.0.103.137:8080</param-value> </init-param> <init-param> <param-name>renew</param-name> <param-value>false</param-value> </init-param> <init-param> <param-name>gateway</param-name> <param-value>false</param-value> </init-param> </filter> 看一下AuthenticationFilter的代码： public final void doFilter(final ServletRequest servletRequest, final ServletResponse servletResponse, final FilterChain filterChain) throws IOException, ServletException { final HttpServletRequest request = (HttpServletRequest) servletRequest; final HttpServletResponse response = (HttpServletResponse) servletResponse; final HttpSession session = request.getSession(false); final Assertion assertion = session != null ? (Assertion) session.getAttribute(CONST_CAS_ASSERTION) : null; if (assertion != null) { filterChain.doFilter(request, response); return; } final String serviceUrl = constructServiceUrl(request, response); final String ticket = CommonUtils.safeGetParameter(request,getArtifactParameterName()); final boolean wasGatewayed = this.gatewayStorage.hasGatewayedAlready(request, serviceUrl); if (CommonUtils.isNotBlank(ticket) || wasGatewayed) { filterChain.doFilter(request, response); return; } final String modifiedServiceUrl; log.debug("no ticket and no assertion found"); if (this.gateway) { log.debug("setting gateway attribute in session"); modifiedServiceUrl = this.gatewayStorage.storeGatewayInformation(request, serviceUrl); } else { modifiedServiceUrl = serviceUrl; } if (log.isDebugEnabled()) { log.debug("Constructed service url: " + modifiedServiceUrl); } final String urlToRedirectTo = CommonUtils.constructRedirectUrl(this.casServerLoginUrl, getServiceParameterName(), modifiedServiceUrl, this.renew, this.gateway); if (log.isDebugEnabled()) { log.debug("redirecting to \"" + urlToRedirectTo + "\""); } response.sendRedirect(urlToRedirectTo); } 从Session取assertion，就是登录信息，如果有，就继续执行其他Filter。 然后看有没有ticket，也就是通票。有的话，继续执行其他Filter。 else就拼接URL，跳转。 http://10.0.103.137:8080/cas/login?service=http%3A%2F%2F10.0.103.137%3A8080%2FUserManage%2F （4）跳转到server端了 请求： GET /cas/login?service=http%3A%2F%2F10.0.103.137%3A8080%2FUserManage%2F HTTP/1.1 Cookie: CASTGC=TGT-2-DmMvVs9Wy01ScbnMtgtLzgcyX5X14TGcM1f5iGuWIBrlDwTg4Q-cas01.example.org; JSESSIONID=2DA712066025406394C7C644AF16FD18 可以看到,浏览器自动把CASTGC带过来了。 响应： HTTP/1.1 302 Moved Temporarily Server: Apache-Coyote/1.1 Pragma: no-cache Expires: Thu, 01 Jan 1970 00:00:00 GMT Cache-Control: no-cache Cache-Control: no-store Location: http://10.0.103.137:8080/UserManage/?ticket=ST-1-0dnlMstfctMYVcat5wfy-cas01.example.org Content-Length: 0 Date: Wed, 30 Oct 2013 01:54:22 GMT 又跳回了子系统，但是带着ticket过来的 后台流程： <decision-state id="ticketGrantingTicketExistsCheck"> <if test="flowScope.ticketGrantingTicketId != null" then="hasServiceCheck" else="gatewayRequestCheck" /> </decision-state> CASTGC有了，所以走hasServiceCheck <decision-state id="hasServiceCheck"> <if test="flowScope.service != null" then="renewRequestCheck" else="getSubSystemUrl" /> </decision-state> service参数也有了，所以走renewRequestCheck <decision-state id="renewRequestCheck"> <if test="requestParameters.renew != '' and requestParameters.renew != null" then="serviceAuthorizationCheck" else="generateServiceTicket" /> </decision-state> renew客户端配置的是false，所以请求里无此参数。走generateServiceTicket <action-state id="generateServiceTicket"> <evaluate expression="generateServiceTicketAction" /> <transition on="success" to ="warn" /> <transition on="error" to="generateLoginTicket" /> <transition on="gateway" to="gatewayServicesManagementCheck" /> </action-state> 看下代码： protected Event doExecute(final RequestContext context) { final Service service = WebUtils.getService(context); final String ticketGrantingTicket = WebUtils.getTicketGrantingTicketId(context); try { final String serviceTicketId = this.centralAuthenticationService .grantServiceTicket(ticketGrantingTicket, service); WebUtils.putServiceTicketInRequestScope(context, serviceTicketId); return success(); } catch (final TicketException e) { if (isGatewayPresent(context)) { return result("gateway"); } } return error(); } 根据ticketGrantingTicket和service，生成通票，并放到request中。成功跳到warn <decision-state id="warn"> <if test="flowScope.warnCookieValue" then="showWarningView" else="redirect" /> </decision-state> 跳转时，不显示提醒页面，所以直接走redirect. <action-state id="redirect"> <evaluate expression="flowScope.service.getResponse(requestScope.serviceTicketId)" result-type="org.jasig.cas.authentication.principal.Response" result="requestScope.response" /> <transition to="postRedirectDecision" /> </action-state> <decision-state id="postRedirectDecision"> <if test="requestScope.response.responseType.name() == 'POST'" then="postView" else="redirectView" /> </decision-state> 这个看不太懂，反正最后执行redirectView了。 <end-state id="redirectView" view="externalRedirect:${requestScope.response.url}" /> 执行跳转，哦了 （5）又回到客户端了 请求： GET /UserManage/?ticket=ST-1-0dnlMstfctMYVcat5wfy-cas01.example.org HTTP/1.1 响应： HTTP/1.1 302 Moved Temporarily Server: Apache-Coyote/1.1 Set-Cookie: JSESSIONID=3A8260292C0430806E231B0E76907137; Path=/UserManage Location: http://10.0.103.137:8080/UserManage/;jsessionid=3A8260292C0430806E231B0E76907137 Content-Length: 0 Date: Wed, 30 Oct 2013 01:54:24 GMT 这个有点莫名其妙，又跳转了。 这时，是客户端的CAS Validation Filter在作怪。 <filter> <filter-name>CAS Validation Filter</filter-name> <filter-class>org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter</filter-class> <init-param> <param-name>casServerUrlPrefix</param-name> <param-value>http://10.0.103.137:8080/cas/</param-value> </init-param> <!-- 客户端应用服务地址--> <init-param> <param-name>serverName</param-name> <param-value>http://10.0.103.137:8080</param-value> </init-param> </filter> 它发现URL中有ticket了，马上就拿它去服务端check一下，看是否有效，是否过期什么的。 这里用的是Cas20ProxyReceivingTicketValidationFilter，它继承了AbstractTicketValidationFilter 看看它的doFilter代码： public final void doFilter(final ServletRequest servletRequest, final ServletResponse servletResponse, final FilterChain filterChain) throws IOException, ServletException { if (!preFilter(servletRequest, servletResponse, filterChain)) { return; } final HttpServletRequest request = (HttpServletRequest) servletRequest; final HttpServletResponse response = (HttpServletResponse) servletResponse; final String ticket = CommonUtils.safeGetParameter(request, getArtifactParameterName()); if (CommonUtils.isNotBlank(ticket)) { if (log.isDebugEnabled()) { log.debug("Attempting to validate ticket: " + ticket); } try { final Assertion assertion = this.ticketValidator.validate(ticket, constructServiceUrl(request, response)); if (log.isDebugEnabled()) { log.debug("Successfully authenticated user: " + assertion.getPrincipal().getName()); } request.setAttribute(CONST_CAS_ASSERTION, assertion); if (this.useSession) { request.getSession().setAttribute(CONST_CAS_ASSERTION, assertion); } onSuccessfulValidation(request, response, assertion); if (this.redirectAfterValidation) { log. debug("Redirecting after successful ticket validation."); response.sendRedirect(constructServiceUrl(request, response)); return; } } catch (final TicketValidationException e) { response.setStatus(HttpServletResponse.SC_FORBIDDEN); log.warn(e, e); onFailedValidation(request, response); if (this.exceptionOnValidationFailure) { throw new ServletException(e); } return; } } filterChain.doFilter(request, response); } 取ticket，然后 final Assertion assertion = this.ticketValidator.validate(ticket, constructServiceUrl(request, response)) 看看，直接就返回了assertion，这就是登录者信息，包括用户名什么的。 然后放到request和session里了。 validate方法，实际是调用的AbstractUrlBasedTicketValidator的validate方法，看看 final String validationUrl = constructValidationUrl(ticket, service); if (log.isDebugEnabled()) { log.debug("Constructing validation url: " + validationUrl); } try { log.debug("Retrieving response from server."); final String serverResponse = retrieveResponseFromServer(new URL(validationUrl), ticket); if (serverResponse == null) { throw new TicketValidationException("The CAS server returned no response."); } if (log.isDebugEnabled()) { log.debug("Server response: " + serverResponse); } return parseResponseFromServer(serverResponse); } catch (final MalformedURLException e) { throw new TicketValidationException(e); } 构建一个URL，然后读取响应。实际调用的AbstractCasProtocolUrlBasedTicketValidator的retrieveResponseFromServer方法 protected final String retrieveResponseFromServer(final URL validationUrl, final String ticket) { if (this.hostnameVerifier != null) { return CommonUtils.getResponseFromServer(validationUrl, this.hostnameVerifier, getEncoding()); } else { return CommonUtils.getResponseFromServer(validationUrl, getEncoding()); } } 不知道走的那个，但都是getResponseFromServer方法，看看先。 public static String getResponseFromServer(final URL constructedUrl, final HostnameVerifier hostnameVerifier, final String encoding) { URLConnection conn = null; try { conn = constructedUrl.openConnection(); if (conn instanceof HttpsURLConnection) { ((HttpsURLConnection)conn).setHostnameVerifier(hostnameVerifier); } final BufferedReader in; if (CommonUtils.isEmpty(encoding)) { in = new BufferedReader(new InputStreamReader(conn.getInputStream())); } else { in = new BufferedReader(new InputStreamReader(conn.getInputStream(), encoding)); } String line; final StringBuilder stringBuffer = new StringBuilder(255); while ((line = in.readLine()) != null) { stringBuffer.append(line); stringBuffer.append("\n"); } return stringBuffer.toString(); } catch (final Exception e) { LOG.error(e.getMessage(), e); throw new RuntimeException(e); } finally { if (conn != null && conn instanceof HttpURLConnection) { ((HttpURLConnection)conn).disconnect(); } } } 就是直接访问URL，读取数据。 ------------------------- 代码看完，看抓包数据吧。 实际上，上面带着ticket跳回客户端后，Filter发起了一个访问 请求： GET /cas/serviceValidate?ticket=ST-1-0dnlMstfctMYVcat5wfy-cas01.example.org&service=http%3A%2F%2F10.0.103.137%3A8080%2FUserManage%2F%3Bjsessionid%3D3A8260292C0430806E231B0E76907137 HTTP/1.1 User-Agent: Java/1.6.0_26 看，User-Agent是Java哦~~ 响应： HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Content-Type: text/html;charset=UTF-8 Content-Language: zh-CN Content-Length: 177 Date: Wed, 30 Oct 2013 01:54:24 GMT <cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'> <cas:authenticationSuccess> <cas:user>admin</cas:user> </cas:authenticationSuccess> </cas:serviceResponse> 可以看到，服务端给返回的xml数据，只有用户名。 实际上，想返回更多信息也是可以的，需要修改服务端配置，具体方法请搜索，大概是：cas 登录 返回更多信息 服务端/serviceValidate这个请求是 <servlet> <servlet-name>cas</servlet-name> <servlet-class> org.jasig.cas.web.init.SafeDispatcherServlet </servlet-class> </servlet> 这个Servlet响应的， 在cas-servlet.xml中有这样一段： <bean id="handlerMappingC" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <property name="mappings"> <props> <prop key="/logout">logoutController</prop> <prop key="/serviceValidate">serviceValidateController</prop> 所以，对应调到了ServiceValidateController的handleRequestInternal方法里 里面有一句： final Assertion assertion = this.centralAuthenticationService.validateServiceTicket(serviceTicketId, service); 实际是调用CentralAuthenticationServiceImpl的validateServiceTicket方法 这个类有 @NotNull private TicketRegistry ticketRegistry; /** New Ticket Registry for storing and retrieving services tickets. Can point to the same one as the ticketRegistry variable. */ @NotNull private TicketRegistry serviceTicketRegistry; 实际上，ticket信息就是保存在这两个变量里的。 里面有这样的代码： final ServiceTicket serviceTicket = (ServiceTicket) this.serviceTicketRegistry.getTicket(serviceTicketId, ServiceTicket.class); final List<Authentication> chainedAuthenticationsList = serviceTicket.getGrantingTicket().getChainedAuthentications(); final Authentication authentication = chainedAuthenticationsList.get(chainedAuthenticationsList.size() - 1); final Principal principal = authentication.getPrincipal(); 所以，能拿到Ticket或grant ticket的话，就可以拿到当前用户信息。 后面看不动了，大概就是把用户信息写到响应里吧。 （6）跳转到之前访问的子系统URL 请求： GET /UserManage/;jsessionid=3A8260292C0430806E231B0E76907137 HTTP/1.1 Cookie: JSESSIONID=3A8260292C0430806E231B0E76907137 实际上，到前一步，用户信息已经去到，认证过程已经完毕了，单点登录已经实现。 后面就是正常访问子系统了。 但，每次请求，AuthenticationFilter仍然会检查一下。 看一下AuthenticationFilter的代码： public final void doFilter(final ServletRequest servletRequest, final ServletResponse servletResponse, final FilterChain filterChain) throws IOException, ServletException { final HttpServletRequest request = (HttpServletRequest) servletRequest; final HttpServletResponse response = (HttpServletResponse) servletResponse; final HttpSession session = request.getSession(false); final Assertion assertion = session != null ? (Assertion) session.getAttribute(CONST_CAS_ASSERTION) : null; if (assertion != null) { filterChain.doFilter(request, response); return; } ..... 由于已经登录，assertion不为空，所以直接跳过了。对性能影响不大。 （7）执行logout时，实际是访问server端的logout 请求： GET /cas/logout HTTP/1.1 Cookie: CASTGC=TGT-2-DmMvVs9Wy01ScbnMtgtLzgcyX5X14TGcM1f5iGuWIBrlDwTg4Q-cas01.example.org; JSESSIONID=0F5355FE89E099FF14E149CF9C55644C 响应： HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Pragma: no-cache Expires: Thu, 01 Jan 1970 00:00:00 GMT Cache-Control: no-cache Cache-Control: no-store Set-Cookie: CASTGC=""; Expires=Thu, 01-Jan-1970 00:00:10 GMT; Path=/cas/ Set-Cookie: CASPRIVACY=""; Expires=Thu, 01-Jan-1970 00:00:10 GMT; Path=/cas/ Set-Cookie: JSESSIONID=6DA0ACAEBA3A801CB897E98CE5E92AFC; Path=/cas Content-Type: text/html;charset=UTF-8 Content-Language: zh-CN Content-Length: 728 Date: Wed, 30 Oct 2013 03:31:39 GMT 设置Cookie过期。Session总是新起一个。 然后内容里有： <script>window.location="/cas/login";</script> 同时，会通知所有已登录的子系统，进行退出操作 请求： POST /UserManage/ HTTP/1.1 Content-Type: application/x-www-form-urlencoded Cache-Control: no-cache Pragma: no-cache User-Agent: Java/1.6.0_26 Host: 10.0.103.137:8080 Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2 Connection: keep-alive Content-Length: 484 logoutRequest=%3Csamlp%3ALogoutRequest+xmlns%3Asamlp%3D%22urn%3Aoasis%3Anames%3Atc%3ASAML%3A2.0%3Aprotocol%22+ID%3D%22LR-2-0EQR24uNI0TlMr52CzUYMuf1fOAsQg1O447%22+Version%3D%222.0%22+IssueInstant%3D%222013-10-30T11%3A31%3A39Z%22%3E%3Csaml%3ANameID+xmlns%3Asaml%3D%22urn%3Aoasis%3Anames%3Atc%3ASAML%3A2.0%3Aassertion%22%3E%40NOT_USED%40%3C%2Fsaml%3ANameID%3E%3Csamlp%3ASessionIndex%3EST-2-nfx6OgRedoAMqowQayXr-cas01.example.org%3C%2Fsamlp%3ASessionIndex%3E%3C%2Fsamlp%3ALogoutRequest%3E 响应： HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Content-Length: 0 Date: Wed, 30 Oct 2013 03:31:39 GMT 响应是由客户端的SingleSignOutFilter做出的。 public void doFilter(final ServletRequest servletRequest, final ServletResponse servletResponse, final FilterChain filterChain) throws IOException, ServletException { final HttpServletRequest request = (HttpServletRequest) servletRequest; if (handler.isTokenRequest(request)) { handler.recordSession(request); } else if (handler.isLogoutRequest(request)) { handler.destroySession(request); // Do not continue up filter chain return; } else { log.trace("Ignoring URI " + request.getRequestURI()); } filterChain.doFilter(servletRequest, servletResponse); } （8）奇怪的一点，退出后，在登录页面，马上进行登录， 提交后，服务端还会执行一次跳转。 HTTP/1.1 302 Moved Temporarily Server: Apache-Coyote/1.1 Pragma: no-cache Expires: Thu, 01 Jan 1970 00:00:00 GMT Cache-Control: no-cache Cache-Control: no-store Set-Cookie: JSESSIONID=3911117B64346B50E24F36632C2419D7; Path=/cas Location: http://10.0.103.137:8080/cas/login Content-Length: 0 Date: Wed, 30 Oct 2013 03:37:07 GMT 非得重新生成一个session才干~~导致登录页面又刷了一下，这时再登录就OK了。 奇怪，奇怪~~ 原因不明，调查中~~ ---------------- 我靠： 登录成功后，马上点退出，就有此问题 等几秒，再点退出，就无此问题。 原因是，登录成功后，会马上咔嚓掉session，默认是2秒后挂掉。 马上点退出，Session还没挂，所以不会重建Session， 所以，登录页面提交时，是带着这个Session的ID去的，而此时Session挂掉了，故引起页面刷新。 而等几秒再退出，会创建新session，故后面无问题。 更多信息请看 http://www.mytju.com/classcode/news_readNews.asp?newsID=504 |
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| 评论 COMMENTS | |
guest1027988546 |
2013/12/17 11:56:18 写的很清楚，阅读CAs源码难得的帮助文档呀！ |
guest956590742 |
2016/1/27 16:34:31 cas 4 有设置同步和异步退出的。默认是异步的，所以退出后还有可能客户端没收到服务端的退出请求，没退出。设置同步就好了。 |
guest398875934 |
2017/7/10 16:11:52 楼主，可以把cas的这块的代码给我发一份不，2965837215@qq.com |
guest398875934 |
2017/7/10 16:14:03 不发代码可以加个QQ不，想请教你，用评论这个有点慢，QQ号：2965837215 |
